Monkey fists are awesome!! I've seen em with Stainless Bearings.Years ago when I first joined the Coast Guard and learned to tie a monkeys fist, I made one with Paracord and a 2oz egg sinker in it. I made a fancy knotted “handle” on it about 6” long and a loop on the end. I attached it to my keys for a “key ring”. That thing would put a really nice dent in a stop sign. I always thought it would do the same to a forehead but never got to find out. I may still have it somewhere but that was dang near 30 years ago so no telling where it is.